Nagisa was born into an assassin family . She excelled at anything involved in killing. At the age of 10 she already had a success rate of 100%. When her brother goes missing her world ends, and she goes to Kunugigaoka school of assassins with the help of a clue in her brother's disappearance. Now she has to keep her identity a secret while going to school and trying to find her brother. But with a red headed demon on her trail how can she do it ? *ps I don't own anything but my adorably, fluffy plot bunny